Integrated DC type magnetic buzzer with oscillator circuit 9*5.5mm
Description:
The electromagnetic buzzer generally consists of a plastic housing
with a metal diaphragm that is flexed by an electro- magnet. The
main benefit of this design is the ability to obtain low
frequencies in a small package. Drawbacks include mechanical wear,
electrical noise, lower sound output, and large power consumption.
Difference between active and passive:
An active buzzer has a built-in oscillating source, so it will make
sounds when electrified. But a passive buzzer does not have such
source, so it will not tweet if DC signals are used; instead, you
need to use square waves whose frequency is between 2K and 5K to
drive it. The active buzzer is often more expensive than the
passive one because of multiple built-in oscillating circuits.
Difference between piezo buzzer & magnetic buzzer:
A piezo buzzer generates sound because of the piezoelectric effect
from the piezoelectric ceramic which drives the metallic diaphragm
to vibrate.
A magnetic buzzer is based on the electromagnetic principle, the
metal diaphragm is pulled when input the power, and spring back
without power.
The piezo buzzer is driven by square waves, and the magnetic buzzer
needs 1/2 square waves to drive.
We suggest inputting higher voltage for a piezo buzzer, normally
over 9V to have enough SPL. On the other hand, a magnetic buzzer
can be driven to generate 85 dB by only 1.5V, but the consumption
of the current will be much higher than Piezo one.
To compare the two types of buzzers, the magnetic type can have
lower frequency response with the same dimension.
Though being limited by the dimension, the SPL of a magnetic buzzer
can only reach to 90 dB. The piezo buzzer can achieve the SPL of
120 dB in some spec., some larger size can also easily reach to 100
dB.
Specifications:
| Type | Unit | 09055YT01 | 09055YT03 | 09055YT05 | 09055YT12 |
| Rated voltage | V | 1.5 | 3 | 5 | 12 |
| Operating voltage | V | 1.2-2.5 | 2-5 | 4-7 | 9-15 |
| Rated current | mA | ≤20 | ≤30 | ≤30 | ≤30 |
| Sound output at 10cm | dB | ≥80 | ≥82 | ≥85 | ≥85 |
| Resonant frequency | Hz | | 2700±300 |
| Operating temperature | ℃ | | -20~+70 |
| Storage temperature | ℃ | | -30~+80 |
| Weight | g | | 1 |
Application:
Widely used in quartz crystal clock, air-conditioner instrument,
telephone, BP, copycat, alarm, instrument and apparatus, UPS power
supply, motorcycle steering gear, electronic toy, computer
terminal, and electronic watch.
Dimension: (mm)
Tolerance: ±0.5
Frequency response:
